| (19) |
 |
|
(11) |
EP 0 241 310 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
16.03.1988 Bulletin 1988/11 |
| (43) |
Date of publication A2: |
|
14.10.1987 Bulletin 1987/42 |
| (22) |
Date of filing: 10.04.1987 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI NL |
| (30) |
Priority: |
11.04.1986 JP 8358786
|
| (71) |
Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA |
|
() |
|
| (72) |
Inventors: |
|
- Makoto, Yanai
()
- Yoshiro, Ueshima
()
- Shuichi, Tanimoto
()
- Noriaki, Imamura
()
|
|
| |
|
| (54) |
Method for the dry regeneration of a catalyst |
(57) A method for the dry regeneration of a deteriorated catalyst formed in the shape
of a large number of tubes, a honeycomb, or a large number of plates is disclosed
wherein an abrasive material is used to grind the surfaces of the interiors of the
many holes in the deteriorated catalyst, additional aspects of the method include
using silica sand for the abrasive material; causing the abrasive material to flow
through the interiors of the catalyst holes on a current of air; to flow through the
interiors of the catalyst holes by its own weight and by vibration. In addition the
abrasive material may consist of brushes, may be sandpaper, or may consist of files.
In al alternative method, a catalyst edge protection grid is first placed on top of
the deteriorated catalyst, and then the abrasive material is caused to flow through
the interiors of the catalyst holes in order to grind the interior surfaces of the
catalyst holes.